Actuation mechanism for an end effector

Abstract

The present invention relates to a tissue fastening device comprising a body having a plurality of sidewalls defining a channel, an anvil having a proximal end and a distal end and pivotably coupled to the body, and a locking mechanism; the anvil moves between an open position and a closed position, the locking mechanism to lock the anvil in the closed position.

Description

[0001] Cross-references to related applications

[0002] This application claims priority to U.S. Provisional Application No. 62 / 969,725, filed February 4, 2020, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This disclosure relates generally to minimally invasive (e.g., endoscopic and / or laparoscopic) medical devices and related methods of use. More specifically, in some embodiments, this disclosure relates to one or more fastening mechanisms (e.g., stapler devices) for tissue fastening devices, and related methods of use, etc. Background Technology

[0004] Technological advancements have empowered users of medical systems, devices, and methods to perform increasingly complex surgeries on subjects. Connecting tissues, such as those to the gastrointestinal tract or other locations within the body, is a type of surgery where difficulties may arise. Surgical devices are known that grasp or clamp tissue between opposing jaw structures and then attach the tissue using surgical fasteners. Fasteners may include surgical staples. In some surgeries, cutting instruments may be provided to cut the tissue already attached by the fasteners. Disadvantages of these systems include, for example, maintaining the jaws of the tissue fasteners in a closed configuration to provide adequate tissue compression during tissue cutting and / or staplering and / or additional medical procedures. For example, movement of only a flexible traction mechanism (e.g., filament) proximally may not provide adequate tissue compression during staplering. Therefore, tissue may not be properly stapled and / or cut, which may increase treatment time and / or cost, may result in undesirable or incomplete tissue fastening, and / or may require additional treatment / intervention at the target site. This disclosure addresses one or more of these problems or other issues in the art. However, the scope of this disclosure is defined by the appended claims, not by its ability to solve specific problems. Summary of the Invention

[0005] According to one aspect, the tissue fastening device includes a body, an anvil having a proximal end and a distal end and pivotally connected to the body, and a locking mechanism configured to lock the anvil in a closed position; the body includes a plurality of sidewalls defining a channel, and the anvil is configured to move between an open position and a closed position.

[0006] The locking mechanism may include (1) a ramp having an inclined surface angled toward the proximal end of the body, and (2) a top surface parallel to the bottom surface of the body.

[0007] The proximal end of the anvil can be configured to engage the ramp and slide along it as the anvil moves in the proximal direction.

[0008] When the proximal end of the cutting board is placed on the top surface of the ramp, the cutting board can be locked in the closed position.

[0009] The cutting board may include a cutting board recess extending into the surface of the cutting board, which may be configured to engage a locking mechanism to lock the cutting board in a closed position.

[0010] The locking mechanism may include a clamp on the body that can be configured to engage an anvil recess.

[0011] The clamp may include a clamp protrusion extending from the top surface of the clamp, which may be configured to engage a notch in the cutting board when the cutting board is in the closed position.

[0012] The tissue fastening device may also include a clamping wire connected to the bottom surface of the clamp and extending proximally into the clamp, wherein proximal movement of the clamping wire can be configured to move the clamp away from the anvil and disengage the clamping protrusion from the anvil recess.

[0013] The locking mechanism may include a pin extending in a proximal direction and having a locking pin attached to the distal end of the locking pin, wherein the locking pin engages the anvil recess in a closed position.

[0014] When the cutting board is in the locked position, the notch on the cutting board can face the near side.

[0015] The fastening device may also include a pulley, wherein a pin wire may be configured to engage the pulley.

[0016] The tissue fastening device may also include a biasing mechanism extending within the body and connected to a locking pin, wherein the biasing member can be configured to bias the locking pin toward the anvil.

[0017] The body may include slots in opposite sidewalls of the body, wherein the anvil may include pins extending from opposite sidewalls, and wherein each pin is configured to engage a corresponding slot in the body and is slidable relative to the body within the slot.

[0018] When the cutting board is locked in the closed position by the locking mechanism, the cutting board can be roughly parallel to the body.

[0019] The body may include a slot in one of a plurality of sidewalls of the body and extending along a longitudinal axis, and a distally facing recess disposed on the longitudinal axis and distal to the slot, wherein a plurality of pins may extend from the anvil, wherein a first pin of the plurality of pins may engage the slot, and wherein a second pin of the plurality of pins may be configured to engage the recess to lock the anvil in a closed position.

[0020] According to another aspect, the tissue fastening device includes a body, an anvil, a first protrusion, and a second protrusion; the body includes a plurality of sidewalls defining a channel, wherein one of the plurality of sidewalls includes a slot extending along a longitudinal axis; the anvil has a proximal end, a distal end, and a pin that pivotally connects the anvil to the body via the slot, wherein the anvil is configured to move between an open position and a closed position; the first protrusion extends from the top wall of the slot toward the longitudinal axis, and the second protrusion extends from the bottom wall of the slot toward the longitudinal axis, wherein the two protrusions are configured to engage the pin and lock the anvil in the closed position.

[0021] The first and second protrusions may include ball-head spring plungers, and wherein the pin is configured to push the first and second protrusions away from the longitudinal axis when the pin moves proximally or distally to the first and second protrusions.

[0022] According to another aspect, the method of securing tissue includes advancing a tissue securing device to a target site within a patient's body, the tissue securing device including an anvil plate pivotally connected to a body; moving a wire connected to the anvil plate proximally to rotate the anvil plate from an open position to a closed position; and advancing a locking pin into an anvil plate recess extending into the anvil plate to lock the anvil plate in the closed position.

[0023] The method may further include performing one or more of the stapling or cutting of tissue after the anvil is in the closed position; and withdrawing the locking pin from the anvil slot after performing one or more of the stapling or cutting.

[0024] Retraction may include overcoming the biasing force of the biasing member connected to the locking pin. Attached Figure Description

[0025] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate various exemplary embodiments and, together with the description, serve to explain the principles of the disclosed embodiments.

[0026] Figure 1 This is a schematic diagram of an organization fastening system according to one embodiment;

[0027] Figure 2A and Figure 2B According to an embodiment, Figure 1 A view of the fastening device in the central fastening system;

[0028] Figures 3A to 3C According to one embodiment, along Figure 1 A sectional view of the fastening device of the central fastening system along line ZZ;

[0029] Figure 4A and Figure 4B According to an embodiment, Figure 1 A view of the fastening device in the central fastening system;

[0030] Figure 5A and Figure 5B According to an embodiment, Figure 1 A view of the fastening device in the central fastening system;

[0031] Figure 6A and Figure 6B According to an embodiment, Figure 1 A view of the fastening device in the central fastening system;

[0032] Figure 7A and Figure 7B According to an embodiment, Figure 1 A view of the fastening device in the central fastening system;

[0033] Figure 8A and Figure 8B According to an embodiment, Figure 1 A view of the fastening device in the central fastening system;

[0034] Figure 9A and Figure 9B According to an embodiment, Figure 1 A view of the fastening device in the central fastening system;

[0035] Figures 10A to 10C According to an embodiment, Figure 1 A view of the fastening device in the central fastening system;

[0036] Figure 11A and Figure 11B According to an embodiment, Figure 1 A view of the fastening device in the central fastening system;

[0037] Figures 12A to 12C According to an embodiment, Figure 1 A view of the fastening device in the central fastening system;

[0038] Figures 13A to 13C According to an embodiment, Figure 1 A view of the fastening device in the central fastening system;

[0039] Figure 14A and Figure 14B According to an embodiment, Figure 1 A view of the fastening device of the central fastening system; and

[0040] Figures 14C to 14F yes Figure 14A and Figure 14B A view of the fastening device and the attachment position of the locking mechanism of the central fastening device. Detailed Implementation

[0041] This disclosure is described with reference to exemplary medical systems and tools for accessing target sites, such as for grasping, cutting, and / or stapled tissue. This can provide improved medical tool functionality and / or assist medical professionals in improving tissue cutting and / or fastening. In some instances, ensuring proper alignment between the anvil and body of the stapler can provide improved tissue staplening. However, it should be noted that references to any particular device and / or any particular procedure are for convenience only and are not intended to limit this disclosure. Those skilled in the art will recognize that the ideas of the disclosed devices and application methods can be used in any suitable procedure, medical or otherwise. This disclosure may be understood with reference to the following description and accompanying drawings, wherein similar elements are referred to by the same reference numerals.

[0042] For ease of description, portions of the disclosed device and / or its components are referred to as proximal portions and distal portions. It should be noted that the term "proximal" is intended to refer to the portion closer to the user of the device, while the term "distal" is used herein to refer to the portion further away from the user. Similarly, "extending distally" indicates that a component extends distally, and "extending proximally" indicates that a component extends proximally. Additionally, as used herein, the terms "about," "approximately," and "generally" indicate a range of values ​​within ±10% of the stated and / or implied values. Furthermore, terms indicating the geometry of a component / surface refer to both precise and approximate shapes.

[0043] Embodiments of this disclosure can be used to cut tissue and / or secure tissue within an intracavitary space, or to facilitate such a process. According to one example, the securing device may be a tissue stapler, which may include a cutting or slicing mechanism (e.g., an integrated blade) and a stapler mechanism (e.g., a stapler). The stapler can be delivered to the target tissue site through the endoscopic working channel. All or part of the tissue stapler and retraction mechanism may be metal, plastic, or may include shape memory metals (such as nitinol), shape memory polymers, polymers, or any combination of materials. While reference is made herein to a stapler, the described locking can be used with any device having opposing claws designed to hold tissue therebetween.

[0044] Figure 1 A surgical device 10 according to an example of this disclosure is illustrated. Device 10 may be a surgical stapling device configured to engage body tissue and apply multiple surgical fasteners to the body tissue during minimally invasive surgical procedures, such as laparoscopic or endoscopic procedures. In some embodiments, device 10 may be a suturing device for delivering sutures for tissue closure during minimally invasive surgery. Device 10 may be used to apply sutures, surgical clamps, or other fasteners, but is primarily discussed in cases where tissue is gripped to perform additional procedures on the tissue (e.g., stapling and / or cutting of the tissue).

[0045] like Figure 1 As shown, device 10 includes a proximal segment 20 and a distal segment, such as an end effector 100. Surgical device 10 also includes a handle assembly 30, an elongated body 50, and a stapler device 110 at the end effector 100. The elongated body 50 may extend to any length suitable for endoscopic or laparoscopic surgery and may be configured to be located within the working channel of an endoscope. The elongated body 50 may detach from the handle assembly 30 to facilitate insertion of the elongated body 50 into the working channel of an endoscope or into the channel of another device, for example, by reversing the loading of the elongated body 50 into the working channel. In some instances, the elongated body 50 may be flexible, steerable, and / or rotatable about its axis. The elongated body 50 may include a lumen for positioning an actuating filament therein to actuate the stapler device 110 or any other portion of actuation device 10 via the handle assembly 30. The elongated body 50 may be configured to receive a plurality of actuation wires or a single actuation wire (e.g., actuation wire 40). In some instances, the elongated body 50 may be fixedly connected to the stapler device 110; in other instances, the elongated body 50 may be removably or releasably connected to the stapler device 110. Unless otherwise indicated, any wire or actuation device described herein may extend from the shank assembly 30 to the end effector 100 via the lumen of the elongated body 50.

[0046] The handle assembly 30 may include a handle 32 and a body 34. The handle 32 may include a retaining portion 32a and an actuator portion 32b. The retaining portion 32a of the handle 32 may be fixedly connected to the body 34. The actuator portion 32b may include a circular or elliptical portion or a ring to position a user's fingers therein, which may assist the user in gripping the handle assembly 30. In some embodiments, the actuator portion 32b of the handle 32 may be an actuator that is pivotally connected to the body 34 and movable relative to the retaining portion 32a of the handle 32. In some embodiments, the actuator portion 32b of the handle 32 may be connected via an adjustable connector 36 to a proximal portion of an actuation wire (such as an actuation wire 40). The anvil (e.g., anvil 120) of the stapler device 110 may be actuated via the actuation wire 40 extending between the stapler device 110 and the handle assembly 30. In other instances, the actuator portion 32b of the shank 32 may be configured to control any other mechanism of the device 100, such as actuation of the stapling from the stapler assembly 110. It should be understood that the wire 40 has sufficient stiffness to be pushed distally and pulled proximally.

[0047] In some instances, the handle assembly 30 may include a movable cover 38 pivotally connected to the housing 34 at a pivot point 38b. Figure 1In the diagram, cover 38 is shown in the open position, thus exposing the interior portion of the body 34. Cover 38 can be attached to the proximal portion of the body 34 and, when in a closed configuration (e.g., with the distal end 38a of cover 38 facing the surface 34a of the body 34), can cover the interior components of the handle assembly 30. Cover 38 can be temporarily and securely attached to the position covering the interior components of the body 34 via a connecting mechanism (such as a snap-fit ​​mechanism) at the distal portion of cover 38 and the distal portion of handle assembly 30. When in the closed configuration, cover 38 can form a pair of slots (not shown) in the body 34. When the distal portion of cover 38 is disengaged from the distal portion of the body 34, the user can rotate (or pivot) cover 38 at pivot point 38b to access the interior components of handle assembly 30.

[0048] The handle assembly 30 may include one or more adjustable connectors 36, 39 configured to receive a portion of an actuation cable (such as actuation cable 40). Any of the adjustable connectors 36, 39 may be a vise movable to clamp downwards onto the actuation cable 40 and securely connect the actuation cable to the adjustable connector 36, 39. In some instances, the adjustable connectors 36, 39 may be movable via screws to adjust the connectors 36, 39 and connect or disconnect the actuation cable 40 and the connectors 36, 39. The connectors 36, 39 may be used for movement of additional cables described herein.

[0049] Adjustable connector 39 can be connected to longitudinal actuator 31 and can move longitudinally within body 34 via translation of longitudinal actuator 31. Longitudinal actuator 31 may be partially located within housing 34 and can slide longitudinally within two slots formed when cover 38 is located on internal components of handle assembly 30. Longitudinal actuator 31 may include a pair of opposing circular or elliptical portions or annulus, wherein each circular portion defines an opening for a user to point their hand therein. In some instances, longitudinal actuator 31 may be connected to actuation wire (not shown), such as via adjustable connector 39 or via different connectors within body 34; and may be configured to control the deployment of pins from stapler device 110. In other instances, longitudinal actuator 31 may be configured to control any other mechanism of device 10, such as actuation of anvil 120 of stapler device 110.

[0050] The end effector 100 of device 10 includes a stapler device 110 connected to a distal portion of an elongated body 50. A connector 102 of the stapler device 110 connects the elongated body 50 to the stapler device 110. In some embodiments, the connector 102 may be offset from the longitudinal axis of the body 130 of the stapler device 110. The body 130 of the stapler device 110 may include a cartridge 132 located within a channel of the body 130. The cartridge 132 may be fixedly connected to the body 130 or removable from the body 130. In some embodiments, the cartridge 132 may be integrally formed in the body 130. At a proximal portion of the body 130, an anvil 120 may be rotatably or pivotally connected to the body 130 via a pin 120a (which may define a pivot axis) and may extend distally toward the distal end of the stapler device 110. In some instances, the anvil 120 may be rotatably biased using a spring or the like and biased to an open configuration, for example, biased away from the body 130 and the barrel 132, thereby creating a space between the distal portion of the anvil 120 and the distal portions of the body 130 and the barrel 132. The anvil 120 may rotate about the pin 120a to contact the body 130, or to hold tissue between the anvil 120 and the body 130, and provides a surface for abutment for drive when the ferrule is ejected from the barrel 132. For ease of understanding, the pin 120a and the corresponding opening or slot are described herein in the singular, i.e., the reference stapler device has only a single side. Unless otherwise indicated, the opposite sides of the stapler device have the same elements oriented in the same manner as described in each instance (e.g., the opposite sides of the stapler device may be mirror images of the disclosed elements). For example, if a pin extends from the anvil and moves within a slot on the first side of the fastener assembly, then a second pin is located on the opposite side of the anvil and slides within a similarly positioned slot on the opposite side of the fastener assembly.

[0051] In some instances, body 130 may include a channel supporting cartridge 132. Cartridge 132 may contain multiple surgical fasteners, such as ferrules; and the fasteners may be deployed from cartridge 132 under the influence of a driving force applied by an actuating slider. Multiple spaced longitudinal slots 134 in cartridge 132 allow ferrules to pass through cartridge 132 and pierce tissue. In some instances, (when actuated) the actuating slider moves longitudinally from the distal end of cartridge 132 and / or body 130 proximally, thereby contacting the fastener within cartridge 132 and pushing the fastener through the longitudinal slots 134 to attach the fastener to tissue. In some instances, a single fastener may extend through each slot 134. Each fastener may be partially within the slot 134 prior to deployment to assist in alignment of the fastener with the slot 134. In some instances, multiple actuating sliders may actuate fasteners in two different longitudinal rows within cartridge 132. To facilitate proper tissue fastening, locking mechanisms may be provided on the stapler assembly 110. For ease of understanding, reference is generally made to the tube 132, while the slot 134 is not shown. It should be understood that the locking mechanisms described herein can maintain a generally parallel arrangement between the anvil 120 and the body 130 during staplening, suturing, etc., which can improve the adhesion between tissues.

[0052] Figure 2A An example of a locking mechanism for maintaining the position of an anvil 120 during a fastening process is shown. The anvil 120 may include a pin 120a extending from its side. The pin 120a extends from the sidewall of the anvil 120 and may be disposed in a slot 136 on the side of the body 130. The pin 120a of the anvil 120 is movable within the corresponding slot 136, which has a generally elliptical shape and extends along a longitudinal axis A in the longitudinal direction. The anvil 120 may also rotate about the pin 120a. For example, when the pin 120a is located at the distal end of the slot 136, the anvil 120 may be in an open configuration (e.g., Figure 3B(as shown); and when pin 120a is located at the proximal end of slot 136, anvil 120 can be in a closed position. Wire 40 can be attached to the proximal end 122 of anvil 120 via attachment mechanism 122a. Movement of wire 40 toward the proximal side can cause movement of anvil 120 toward the proximal side and / or cause rotation of anvil 120 about pin 120a. The pin 120a has a diameter of approximately 1 / 16". The slot 136 has a length of approximately 1 / 4" and a height of approximately 1 / 16", but is sized to allow the pin 120a to slide within it (e.g., the height of the slot 136 is approximately equal to but greater than the diameter of the pin 120a). The slot 136 may be located in an upper extension of the body 130. In some embodiments, the upper extension may extend upward and to the right, i.e., toward the distal end of the body 130. In other embodiments, the upper extension of the body 130 may extend only upward. In other embodiments, space may be provided between the upper extension and the body 130. It should be understood that the upper extension may be used with any fastener body described in the examples herein.

[0053] The body 130 of the fastener assembly 110 may include a ramp 138 having a rounded or curved distal end, such that the proximal end of the ramp 138 is higher than the distal end of the ramp 138. The ramp 138 may include two parallel ramps forming a channel 139 therebetween, such as... Figure 2A As shown. Alternatively, a single ramp 138 may be provided, and the attachment mechanism 122a may be offset to allow the wire 40 to move without obstruction by the ramp 138. The wire 40 may move proximally and / or distally within the slot 139 to move the anvil 120 proximally and / or distally. For example, as the anvil 120 moves proximally, the proximal end 122 may contact the curved distal end of the ramp 138, thereby causing the proximal end 122 to move upward on the ramp 138. As the anvil 120 moves proximally, the pin 120a moves proximally within the slot 136 along the longitudinal axis A. Simultaneously, the anvil 120 rotates about the pin 120a, thereby forcing the distal end 124 of the anvil 120 toward the barrel 132. When the pin 120a is at the distal end of the slot 136, the anvil 120 has been fully rotated toward the barrel 132 to a closed configuration. The contact between the proximal end 122 and the ramp 138 provides sufficient friction to maintain the closed configuration of the anvil 120. This allows, for example, tissue to be grasped between the anvil 120 and the body 130 to perform additional medical procedures.

[0054] The method of operating the cutting board 120 is now explained. When the pin 120 is at the distal end of the slot 136, the cutting board 120 can be in an open configuration, such as... Figure 2BAs shown. In the open configuration, tissue can be inserted between the anvil 120 and the body 130 of the stapler device 110. The user can then move the wire 40 proximally, causing the proximal end 122 to move proximally and contact the ramp 138. Continued proximal movement of the wire 40 causes the proximal end 122 to travel upward on the curved / inclined surface 138a of the ramp 138. This proximal movement also causes the pin 120a to move proximally within the slot 136 along the longitudinal axis A. The upward movement of the proximal end 122 on the inclined surface 138a of the ramp 138 causes the anvil 120 to rotate about the pin 120a. The pivoting of the anvil 120 about the pin 120a causes the distal end 124 of the anvil 120 to move toward the barrel 132, thereby gripping tissue and / or any other material between the anvil 120 and the barrel 132. In this way, the cutting board 122 can be locked against the tissue during the tightening process to assist in providing accurate tightening.

[0055] Subsequently, additional medical procedures can be performed on the tissue or material held between the anvil 120 and the barrel 132, for example, the tissue can be secured together via one or more clips. As another example, the tissue can be cut, or other medical procedures can be performed on the held tissue. Once the additional medical procedure is completed, the wire 40 can be moved distally, causing the proximal end 122 of the anvil 120 to move downward on the ramp 138. As the proximal end 122 moves downward on the ramp 138, the pin 120a slides distally along the longitudinal axis A within the slot 136, and the anvil 120 pivots about the pin 120a, causing the distal end 124 to rotate away from the barrel 132.

[0056] Another example of a locking mechanism for the stapler device 310 is shown in Figures 3A to 3C The body 330 of the stapler device 310 includes a slot 336 having a longitudinal axis A. A pin 320a extends from an anvil 320 into the slot 336. The pin 320a is configured to slide within the slot 336 along the longitudinal axis A, and the anvil 320 is configured to rotate about the pin 320a. The anvil 320 includes a distal end 324 and a proximal end 322, wherein the proximal end 324 is attached to the wire 40 via an attachment mechanism 322a. A slot 325 extends from the bottom surface of the proximal end 322 into the anvil 320 and is extendable through the anvil 320 to the top surface of the proximal end 322. As with other stapler devices, a barrel 332 is disposed within the body 330.

[0057] A clamp 350 having a protrusion 352 extending vertically from the distal end of the clamp 350 is shown in Figure 3AThe clamp 350 may be formed as part of the body 330 from the distal end of the elongated member 50, or the clamp 350 may extend from the proximal end of the surgical device 10 and along a catheter or other lumen (e.g., the lumen of the elongated body 50). The protrusion 352 is configured to insert into the slot 325 and lock the anvil 320 in a closed configuration, as described herein. An actuation wire 42 is attached to the distal end of the clamp 350 on the underside of the clamp 350 (i.e., the side opposite the protrusion 352). The actuation wire 42 is configured to move proximally and distally. The clamp 350 may be biased by, for example, a spring or other biasing element. Figure 3A and Figure 3C The position is shown. Movement of the actuation wire 42 in the proximal direction causes the clamp 350 (including the protrusion 352) to bend downwards and away from the anvil 320 based on the material of the clamp 350 (e.g., plastic). However, it should be understood that the distal end of the clamp 350 (including the protrusion 352) is hinged such that movement of the actuation wire 42 in the proximal direction causes the distal end of the clamp 350 to rotate downwards, and movement of the actuation wire 42 in the distal direction causes the distal end of the clamp 350 to rotate upwards. Figure 3A and Figure 3C The location shown.

[0058] The method of operating the stapler device 310 is now described. The stapler device 310 can be advanced to the target location in any of the manner described herein. The wire 40 can be moved proximally such that the pin 320a (and the anvil 320) moves proximally along the longitudinal axis A and causes the anvil to pivot about the pin 320a. Moving the wire 40 proximally can cause the wire 40 to move upward, for example, toward the pin 320a, thereby causing the proximal end 322 to move upward and the anvil 320 to rotate. The anvil 320 can also be rotated by causing the proximal end 322 to slide upward on the inclined portion of the clamp 350. Additionally or alternatively, when the pin 320a is the proximal end of the slot 336, the anvil 320 can rotate about the pin 320a. The proximal movement and rotation of the anvil 320 can cause the proximal end 322 to move proximally such that the protrusion 352 of the clamp 350 engages the slot 325, as Figure 3B and Figure 3C As shown. This rotation causes the distal end 324 to move toward the body 330 and into a closed configuration. Once the protrusion 352 engages the wire 325, the anvil 320 can be locked in a stationary position, for example, locked in a closed configuration. To unlock the anvil 320, the user can move the actuating wire 42 proximally, causing the clamp 350 to move downward, thereby disengaging the protrusion 352 from the slot 325. Simultaneously, the user can push the wire 40 distally, causing the pin 320a to move distally along the longitudinal axis A, thereby moving the slot 325 away from the protrusion 352 to unlock the anvil 320. Unlocking the anvil 320 allows it to move freely into an open configuration.

[0059] Figure 4A and Figure 4B Another locking mechanism according to another embodiment of the present disclosure is shown. An anvil 420 includes a first pin 420a and a second pin 420b extending from the same sidewall of the anvil 420. A wire 40 is attached to the proximal end 422 of the anvil 420 via an attachment mechanism 422a. The anvil 420 is pivotable about the first pin 420a, and the pin 420a is movable proximally and distally along a longitudinal axis A within a slot 436 in the body 430. A recess 438 is formed in the body 430 distal to the slot 436 along the longitudinal axis A. In an open configuration, the second pin 420b is disengaged from the recess 438. In a closed configuration, the second pin 420b is slidable into and engages with the recess 438, thereby locking the anvil 420 in the closed configuration.

[0060] The stapler device 410 operates similarly to other example stapler devices described herein. Proximal movement of the wire 40 causes the pin 420a to slide proximally within the slot 436 along the longitudinal axis A, thereby moving the anvil 420 proximally. Proximal movement of the wire 40 also causes the anvil 420 to rotate about the pin 420a. Proximal movement of the anvil 420 and rotation about the pin 420a cause the distal end 424 to rotate toward and approach the body 430, thereby causing the second pin 420b to be positioned generally along the longitudinal axis A and aligned with the recess 438. The pin 420b can slide into the recess 438, thereby locking the anvil 420 in a closed position. In some cases, the pin 420b can ride along the wall of the recess 438 until the pin 420b engages within the recess 438. Movement of the elongated member 40 distally causes movement of the anvil 420 distally, thereby releasing the second pin 420b from the recess 438. A biasing force and / or force on the proximal end 422a causes the anvil to rotate about the first pin 420a into an open configuration.

[0061] An example of another fastener device 510 with a locking mechanism is shown in Figure 5A and Figure 5BThe cutting board 520 includes a pin 520a, a distal end 524, and a proximal end 522 extending from a sidewall of the cutting board 520. The pin 520a is movable within a slot 536 in the body 530 of the fastener device 510. The slot 536 extends from the proximal end of the body 530 toward the distal end. A pair of protrusions 536a extend into the slot 536 at the proximal portion of the slot. For example, a first protrusion 536a extends into the slot 536 from the bottom surface of the slot 536, and a second protrusion 536a extends into the slot 536 from the top surface of the slot 536, opposite to the first protrusion 536a. The protrusions 536a may be formed such that they are immobile and / or may be made of a material capable of partially deforming as the pin 522a passes through the space formed between the two opposing protrusions 536a. Alternatively, the protrusion 536a may include a ball-nose spring plunger that is biased toward the center of the slot 536 and can be pushed toward the sidewall of the slot 536 as the pin 522a moves through the protrusion 536a. The wire 40 is attached to the attachment point 522a at the proximal end 522 of the anvil 520. A barrel 532, similar to other barrels described herein, may be disposed within the body 530.

[0062] The operation of the stapler device 510 is now described. The anvil 520 is... Figure 5A The wire 40 is in the open position, with the distal end 524 rotated away from the body 530. The wire 40 moves distally, causing the pin 520a to move proximally within the slot 536 and causing the anvil 520 to move proximally. The anvil 520 can also rotate about the pin 520a, causing the distal end 524 to rotate toward the body 530 to the closed position. The pin 520a can move proximally toward and beyond the protrusion 536a. For example, the protrusion 536a may be movable toward the sidewall of the slot 536, and / or the protrusion 536a may be deformable to allow the pin 520a to pass through. Once the pin 520a is proximally to the protrusion 536a, the anvil 520 is locked in the closed position. To unlock the anvil 520, a force is applied to the wire 40 in a distal direction, sufficient to move the pin 520a to the distal side of the protrusion 536a. Once pin 520a is at the distal end of protrusion 536a, the anvil 530 can be moved distally and rotated to the open position.

[0063] An example of another fastener device 610 with a locking mechanism is shown in Figure 6A and Figure 6BThe anvil 610 includes a first pin 620a and a second pin 620b extending from the same sidewall of the anvil 610, a proximal end 622, and a distal end 624. Pins 620a and 620b are movable within a slot 636 in the body 630 of the stapler assembly 610. The slot 636 extends along a longitudinal axis A from the proximal end of the body 630 toward the distal end. Approximately halfway along the longitudinal axis A, the upper wall of the slot A is angled upward and extends away from the bottom wall of the slot 636, thereby increasing the surface area of ​​the distal end of the slot 636. The angle between the upper wall and the bottom wall of the slot A can be approximately 30 degrees to approximately 45 degrees. The angled portion of the slot 636 allows the anvil 620 to move between an open configuration and a closed configuration. Wire 40 is attached at the proximal end 622 of the anvil 620 to attachment point 622a. A barrel 632, similar to other barrels described herein, may be disposed within the body 630.

[0064] The method of operating the stapler device 610 is now described. The wire 40 can be moved proximally, causing the distal end 624 to rotate toward the body 630. Simultaneously, the first pin 620a slides proximally along the longitudinal axis A, and the second pin 620b rides along the angled portion of the slot 636. This causes the anvil 620 to move toward a closed configuration, i.e., the distal end 624 of the anvil 620 approaches the body 630 of the stapler device 610. Figure 6B The first pin 620a and the second pin 620b are shown, both constrained by a portion of the slot 636 arranged only along the longitudinal axis A, which locks the anvil 620 in a closed configuration. To unlock the device, the wire 40 can be moved distally, which allows the second pin 620b to ride upward on the angled portion of the slot 636, thereby opening the anvil 620.

[0065] Another example of a fastener device 710 is shown in Figure 7A and Figure 7BThe body 730 of the fastener device 710 includes a first slot 736 extending along a longitudinal axis A and above a second slot 738. A first portion of the second slot 738 extends the length of the first slot 736 along a longitudinal axis B parallel to the longitudinal axis A. The second slot 738 curves upward at a position distal to the first slot 736 and terminates approximately at the longitudinal axis A. The second slot 738 may terminate above or below the longitudinal axis A, depending on the desired angle between the anvil 720 and the body 730. According to one example, the radius of curvature of the curve of the second slot 738 may be equal to the distance between the center of the first pin 720a and the center of the second pin 720b. The anvil 720 includes a first pin 720a and a second pin 720b extending from the same sidewall of the anvil 720 and the first pin 720a. The first pin 720a extends into the first slot 736, and the second pin 720b extends into the second slot 738. The pin-slot arrangement allows the anvil 720 to move between an open and closed configuration. Wire 40 is attached to attachment mechanism 722a at the proximal end 722 of the anvil 720.

[0066] The method of operating the stapler device 710 is now described. Moving the wire 40 proximally causes the pin 720a to move proximally along the longitudinal axis A within the first slot 736. Simultaneously, the second pin 720b travels along the curved portion of the second slot 738 and approaches the longitudinal axis B, causing the distal end 724 of the anvil 720 to approach the body 730. When the second pin 720b reaches the longitudinal axis B, the pin 720b moves proximally along the longitudinal axis B within the second slot 738. Positioning the pin 720b along the longitudinal axis B of the second slot 738 locks the anvil 720 in a closed configuration. As with other stapler devices described herein, moving the wire 40 distally moves the anvil 720 to an open configuration. For example, moving the wire 40 in a distal direction will push the anvil 720 distally and cause the second pin 720b to ride along the curved portion of the second slot 730 to the open position, thereby releasing any tissue gripping between the anvil 720 and the body 730.

[0067] Another locking mechanism for the stapler device 810 is shown in Figure 8A and Figure 8BThe stapler assembly 810 includes a body 830 having a barrel 832 and a slot 836 extending along a longitudinal axis A. A support member 838 is generally perpendicular to the body 830 and extends from the top surface of the body 830, and is located proximal to the slot 836. An anvil 820 includes a proximal end 822 and a distal end 824, and includes a pin 820a extending from its sidewall. The pin 820a is configured to slide within the slot 836 along the longitudinal axis A, and the anvil 820 is configured to rotate about the pin 820a. Wire 40 is attached to an attachment mechanism 822a of the proximal end 822. A notch 821 extends from the top surface of the proximal end 822 into the anvil 820.

[0068] The support member 838 includes a circular member 870, such as a pulley, mounted at the end of the support member 838 remote from the body 810. The circular member 870 is rotatable about an axis or can be fixed. An actuation wire 42 extends from the proximal end of the surgical device 10 and contacts the surface of the circular member 870. A locking pin 862 may be attached to the distal end of the actuation wire 42. A biasing member 860 (such as a spring) is also attached to the locking pin 862. The biasing member 860 is attached distally to the same surface as the actuation wire 42 on the locking pin 862 and proximally to the support member 838. The biasing member 860 biases the locking pin 862 away from the proximal end of the biasing member 860. Figure 8B As shown, locking pin 862 is configured to extend into recess 821 to lock anvil 820 in a closed configuration, as described herein.

[0069] The method of locking the stapler device 810 is now described. Figure 8A The anvil 820 is shown in an open configuration, with its distal end 824 extending away from the body 830. A user can move the wire 40 proximally, causing the pin 820a (including the anvil 820) to slide proximally along the longitudinal axis A. Proximal movement of the wire 40 also causes the anvil 820 to rotate about the pin 820a, causing the distal end 824 to approach the body 830. When the proximal end 822 of the anvil 820 is fully moved proximally, a locking pin 862 is forced into a notch 821 via a biasing member 860, thereby locking the anvil 820 in a closed configuration.

[0070] To unlock the anvil 820, a force is applied to the actuation wire 42, causing it to ride along the curved surface of the circular member 870. This causes the actuation wire 42 to pull the locking pin 862 upward and away from the notch 821. Then, a force is applied to the wire 40 in a distal direction, causing the pin 820a (and the anvil 820) to move distally along the longitudinal axis A, causing the anvil 820 to rotate about the pin 820a, thereby moving the anvil 820 into the open configuration.

[0071] Figure 9A and 9BAnother example of a locking mechanism for a stapler device 910 is shown. The stapler device 910 includes a body 930 having a barrel 932 and a circular opening 936. A pin 920a extending from an anvil 924 is received within the opening 936, and the anvil 920 is rotatable about the pin 920a, allowing the proximal end 922 and distal end 924 of the anvil 920 to move from an open configuration to a closed configuration. Although the stapler device 910 is shown with a circular opening 936, the stapler device 910 may alternatively include a slot (such as the slot described in the examples herein) that allows the anvil 920 to move proximally and / or distally within the slot in addition to rotating about the pin 920a. A wire 40 is attached to an attachment mechanism 922a at the proximal end 922. The proximal end 922 also includes a notch 921; when the anvil 920 is in the closed configuration, the notch 921 faces the distal direction. Figure 9B The notch 921 may receive a locking pin 42a attached to the distal end of the actuation wire 42 to lock the anvil 920 in a closed configuration. The user may move the actuation wire 42 proximally and distally. Alternatively or additionally, the actuation wire 42 may be biased distally via a biasing member (e.g., a spring). Proximity movement of the actuation wire 42 overcomes the biasing mechanism to withdraw the locking pin 42a from the notch 921.

[0072] The operation of the stapler device 910 is now described. Figure 9A In the open configuration shown, the distal end 924 of the anvil 920 rotates away from the body 930. Proximal movement of the wire 40 causes the anvil 920 to rotate about the pin 920a, moving the distal end 924 toward the body 930 to the closed configuration. The rotation of the anvil 920 also allows the proximal end 922 to move upward and proximal, thereby aligning the notch 921 with the locking pin 42a. Once the notch 921 and the locking pin 42a are aligned, the actuating wire 42 can move distally, causing the locking pin 42a to engage the notch 921 and lock the anvil 920 in the closed configuration, as shown. Figure 9B As shown. The position of the locking pin 42a can be maintained by friction. Alternatively, when the locking pin 42a is in the notch 921, the actuating wire 42 can simultaneously move in the same direction as the fastener device 910, thereby maintaining the position of the locking pin 42a in the notch 921. To unlock the fastener device 910, the user can move the actuating wire 42 proximally, causing the locking pin 42a to move away from the notch 921. The user can then move the wire 40 distally, causing the anvil 920 to rotate about the pin 920a to move the anvil 920 into the open configuration.

[0073] Another example of a locking mechanism for the stapler device 1010 is shown in Figures 10A to 10CThe stapler device 1010 includes a body 1030 having a slot 1036 and an anvil 1020 having a pin 1020a slidable within the slot 1036. The slot 1036 includes a longitudinally extending first arm 1036a and a second arm 1036b extending from the distal end of the first arm 1036a. The angle formed between the first arm 1036a and the second arm 1036b is between approximately 90 degrees and 180 degrees, or approximately 135 degrees. Similar to other stapler devices described herein, a wire 40 extends from an attachment mechanism 1022a of the anvil 1020. Proximal and distal movement of the wire 40 causes the pin 1020a to slide within the slot 1036, thereby moving the anvil 1020 proximal and distally.

[0074] A T-shaped member 1039 protrudes vertically from the bottom of the body 1030 toward the anvil 1020. The T-shaped member 1039 may be located proximal to the barrel 1032 disposed within the body 1030, or the T-shaped member 1039 may protrude through the barrel 1032. The anvil 1020 includes a vertical slot 1037a connected to a longitudinal slot 1037b. The vertical slot 1037a is located proximal to the longitudinal slot 1037b, and the longitudinal slot 1037b extends distally from the vertical slot 1037a. Figure 10A and Figure 10C As shown, the vertical slot 1037a extends along the length of the longitudinal slot 1037b inside the anvil 1020. For example, the longitudinal slot 1037b and the vertical slot 1037a form a T-shaped slot to receive a T-shaped member 1039. The top portion of the T-shaped member 1039 is configured to engage the vertical slot 1037a. After the T-shaped member 1039 engages the vertical slot 1037a, movement of the anvil 1020 proximally causes the vertical slot 1037a to move proximally to the T-shaped member 1039, such that the legs of the T-shaped member 1039 protrude through and slide along the longitudinal slot 1037b. In this way, the anvil 1020 can be locked against the T-shaped member 1039.

[0075] Operation of the cutting board 1020 includes moving the cutting board 1020 to an open configuration in a manner similar to those described herein. For example, a force applied to the wire 40 can move the cutting board 1020 in a proximal direction. As the pin 1020a moves along the second arm 1036b of the slot 1036, the cutting board 1020 is pushed upward, and the T-shaped member 1039 disengages from the vertical slot 1037a, thereby moving the cutting board 1020 to the open configuration.

[0076] Another locking mechanism for the stapler device 1110 is shown in Figure 11A and Figure 11BThe stapler device 1110 is similar to the stapler device 1010, including a body 1130 having a barrel 1132, a circular opening 1136, and two support members 1138a, 1138b extending proximally from the top surface of the body 1130 near the opening 1136. An anvil 1120 includes a proximal end 1122 and a distal end 1124, and includes a pin 1120a extending from a sidewall of the anvil 1120. The anvil 1120 is configured to rotate about the pin 1120a. Wire 40 is attached to an attachment mechanism 1122a at the proximal end 1122. Although the stapler device 1110 is shown with a circular opening 1136, the stapler device 1110 may alternatively include a slot (such as the slots described in the various examples herein) that allows the anvil 1120 to move proximally and / or distally in addition to rotating about the pin 1120a. The notch 1121 extends from the top surface of the proximal end 1122 into the anvil 1120.

[0077] The proximal support member 1138a includes a circular member 1170, such as a pulley. The circular member 1170 is mounted at an end remote from the body 1130. The circular member 1170 is rotatable about an axis or can be fixed. An actuation wire 42 extends from the proximal end of the surgical device 10 and contacts the surface of the circular member 1170. A locking pin 1162 may be attached to the distal end of the actuation wire 42. The locking pin 1162 may extend into and move along a channel 1139 defined between the support members 1138a, 1138b. Figure 11B As shown, locking pin 1162 is configured to extend into recess 1121 to lock cutting board 1120 in a closed configuration, as described herein.

[0078] A method for locking the stapler device 1110 is now described. Figure 11A The anvil 1120 is shown in the open configuration, as described herein. A user can move the cord 40 proximally, causing the anvil 1120 to rotate about pin 1120a. This, in turn, causes the distal end 1124 to approach the body 1130 and the proximal end 1122 to move upward, aligning the slot 1121 with the channel 1139. The user can then move the actuation cord 42 distally, causing the locking pin 42a to engage the slot 1121, thereby locking the anvil 1120 in the closed position.

[0079] To unlock the anvil 1120, a proximal force is applied to the actuation wire 42, causing the actuation wire 42 to ride along the curved surface of the circular member 1170 and move the locking pin 1162 out of the slot 1121 within the channel 1139. A distal force can then be applied to the wire 40, causing the anvil 1120 to rotate about the pin 1120a, thereby moving the anvil 1120 into the open configuration.

[0080] Alternatively, the locking pin 1162 may be introduced from the bottom of the body 1130. For example, a channel 1139 may extend from the bottom surface of the body 1130 and into the body 1130. In other words, the circular surface 1170 and the support members 1138a, 1138b may extend from the bottom surface of the body 1130. The operation of the actuation wire 42 and the locking pin 1162 is the same as when the support members 1138a, 1138b extend from the top surface of the body 1130.

[0081] Another example of a fastener device 1210 with a locking mechanism is shown in Figures 12A to 12C The anvil 1220 includes a pin 1220a extending from a sidewall of the anvil 1210, a distal end 1224, and a proximal end 1222. The pin 1220a is movable within a slot 1236 in the body 1230 of the stapler assembly 1210. The slot 1236 extends from the proximal end of the body 1230 toward the distal end and may include an upwardly angled second portion. It should be understood that this additional portion provides additional range of motion for the anvil 1230. The proximal end 1222 includes a distally facing hook 1222b and is engorged with an opening 1238 in the bottom surface of the body 1230. A release mechanism 1242 extends from below the body 1230 toward the bottom surface of the body 1230. The release mechanism 1242 may be a flat member acting as a ramp, such as... Figure 12C As shown. Wire 40 is attached to attachment point 1222a at the proximal end 1222 of the anvil 1220. A barrel 1232, similar to other barrels described herein, may be disposed within the body 1230.

[0082] The operation of the stapler device 1210 is now described. The anvil 1220 is in... Figure 12A The wire 40 is in the open position, with the distal end 1224 rotated away from the body 1230. The distal movement of the wire 40 causes the pin 1220a to move proximally within the slot 1236 and causes the anvil 1220 to move proximally. The anvil 1220 can also rotate about the pin 1220a, causing the distal end 1224 to rotate toward the body 1230 to the closed position. As the anvil 1230 moves proximally, the hook 1222b engages the opening 1238 and the bottom surface of the body 1230, thereby locking the anvil 1230 in the closed position, as... Figure 12B As shown. To unlock the cutting board 1230, the wire 40 moves proximally, causing the hook 1238 to disengage from the bottom surface of the body 1230. The release mechanism 1242 can then be moved into the opening 1238 distal to the hook 1222b, as shown. Figure 12CAs shown. The wire 40 can then be moved distally, causing the anvil 1220 to move distally and the hook 1222b to slide along the top surface of the release mechanism 1242. This allows the hook 1222b to move distally to the opening 1238 without engaging the opening 1238, thereby unlocking the anvil 1220. Once the hook 1222b is distal to the opening 1238, the anvil 1220 can be moved distally and rotated to the open position.

[0083] An example of another locking mechanism for a stapler device is shown in Figures 13A to 13C The stapler device 1310 of the surgical device 10 is similar to other stapler devices described herein, including a body 1330 having a cartridge 1332 and an anvil 1320 pivotally connected thereto. A pin 1320a extends from the side of the anvil 1320 and slides within a slot 1336 of the body 1330. The slot 1336 may be curved, such as... Figure 13A As shown, but not limited to, this configuration. Wire 40 extends from the proximal end of gear slider 1321 (see...). Figure 13B Furthermore, the wire 40 is configured to extend from the proximal end of the body 1330 and move towards the proximal and distal sides.

[0084] like Figure 13B As shown, a plurality of teeth 1322a extend circumferentially from the circular proximal end 1322 of the anvil 1320. The teeth 1322a can contact and cooperate with the gear slider 1321 and corresponding teeth 1321a extending from and to the surface of the gear slider 1321. A wire 40 extends from the proximal end of the gear slider 1321, and moving the wire 40 allows the gear slider 1321 to move proximally and distally. For example, the teeth 1321a of the gear slider 1321 and the teeth 1322a of the proximal end 1322 form a rack and pinion configuration to move the anvil 1320.

[0085] To operate the stapler device 1310, the user can move the wire 40 proximally and distally. Distal movement of the wire 40 causes the anvil 1320 to move to an open configuration. Proximity movement of the wire 40 causes the anvil 1320 to move to a closed configuration. The anvil 1320 can be locked in the open or closed configuration by friction between the teeth 1322a on the anvil 1320 and the teeth 1321a on the gear slider 1321.

[0086] Another fastener device 1410 is shown Figure 14A and Figure 14BThe fastener assembly 1410 includes a body 1430, a barrel 1432, and a cover 1435. The body 1430 may include an extension extending upward from the body 1430 and shaped to receive the cover 1435. The cover 1435 may be attached to the body 1430 by any means, including welding, adhesive, etc. Alternatively, the cover 1435 may be formed as a single part with the body 1430. The cover 1435 includes a slot 1436 extending along a longitudinal axis A in a proximal-distal direction. In some configurations, for example, where the cover 1435 is not integrally formed with the body 1430, the slot 1436 is not provided on the body 1430 until the cover 1435 is attached to the body 1430. The cutting board 1420 includes a proximal end 1422, a distal end 1424, a pin 1420a extending from the side of the cutting board 1420, and an attachment point 1422a at the proximal end 1422. A wire 40 is attached to the attachment point 1422a. The cutting board 1420 is configured to rotate about the pin 1420a, and the pin 1420a and the cutting board 1420 are movable along a longitudinal axis A. The cover 1435 includes a connecting sidewall 1439 and defines a channel 1438 (see [link to cover]). Figure 14C The top portion 1437 of the channel 1438 is described herein as receiving the cutting board 1420, and the top portion 1437 is accessible to the cutting board 1420 and forces the cutting board 1420 to a closed position.

[0087] The method of operating the stapler device 1410 is now described. Figure 14A In the open configuration, when pin 1420a is positioned at the distal end of slot 1436, anvil 1420 is in the open position. Movement of wire 40 towards the proximal side causes proximal end 1422 to move upward and proximally. Anvil 1420 contacts the inner surface of the top portion 1437 of cover 1435, forcing distal end 1424 toward body 1430 to the closed position. Continued proximal movement of wire 40 causes pin 1420a to move along longitudinal axis A to the proximal end, causing anvil 1420 to rotate fully toward body 1430. The top portion 1437 of cover 1435 contacts anvil 1420 in the closed position and assists in locking anvil 1420 in the closed position.

[0088] To open the anvil 1420, the wire 40 moves distally, causing the pin 1420a to slide distally along the longitudinal axis A within the slot 1436. As the anvil 1420 slides away from the cover 1435, the anvil 1420 can rotate about the pin 1420a, causing the distal end 1424 to rotate upward away from the body 1430 to the open configuration.

[0089] Figures 14C to 14F Various cover designs and attachment points of the cover to the body of the fastener assembly 1430 are shown. For example, as discussed herein, Figure 14CA cover 1435 is shown according to one example. The cover 1435 includes a top portion 1437 that connects to a sidewall 1439, which defines a channel 1438. When the cover 1435 is attached to the body 1430 (see...), Figure 14D The slot 1436 extends in a proximal-distal direction. A vertical slot 1436a extends vertically downward from the distal end of the slot 1436. The vertical slot 1436a can receive the pin 1420a during assembly. When the cover is attached to the wall 1431 of the body 1430, the open end of the vertical slot 1436a can be closed. For example, a sidewall 1438 can be provided on the outer surface of the wall 1431. The cover 1435 can be positioned and attached such that the top surface 1431a of each of the walls 1431 covers the vertical slot 1436a, thereby securing the pin 1420a within the slot 1436.

[0090] Another cover 1435' is shown Figure 14E In the middle. Cover 1435' does not include vertical slot 1436a. Pin 1420a can engage slot 1436 during assembly by forcing the sidewalls apart. Cover 1435' can be attached to wall 1431 using any of the methods described herein.

[0091] Figure 14F A cover 1435” according to yet another example is shown. The sidewalls 1439 of the cover 1435” are connected by a top portion 1437a and a bottom portion 1437b. The cover 1435” can slide on the body 1430 during assembly and can be attached to the sidewalls 1431 using any of the methods described herein.

[0092] It should be understood that any of the locking mechanisms described herein may be used alone or in combination with one or more other locking mechanisms described herein.

[0093] While different medical systems have been described, it should be understood that the specific arrangement of components in these fastening systems is not limited. Furthermore, the size, shape, and / or material of the fastening systems are not limited. As described herein, various locking mechanisms are used to maintain the closed configuration of the anvil during fastening procedures. For example, in some procedures, the execution of various medical procedures can be improved by ensuring proper fastening of the tissue.

[0094] It will be apparent to those skilled in the art that various modifications and variations can be made to the disclosed apparatus without departing from the scope of this disclosure. Other embodiments of this disclosure will be apparent to those skilled in the art in light of the specification and practice of the invention disclosed herein. It is to be anticipated that the specification and examples should be considered exemplary only, wherein the true scope and essence of the invention are indicated by the claims.

Claims

1. A tissue fastening device, comprising: A body having multiple sidewalls that define a channel; An anvil having a proximal end and a distal end and pivotally connected to the body, wherein the anvil is configured to move between an open position and a closed position; and A locking mechanism configured to lock the anvil in the closed position, wherein the locking mechanism includes (1) a ramp having an inclined surface angled toward the proximal end of the body, and (2) a top surface parallel to the bottom surface of the body, wherein the proximal end of the anvil is configured to engage the ramp and slide along it when the anvil moves in a proximal direction.

2. The tissue fastening device according to claim 1, wherein the anvil is locked in the closed position when the proximal end of the anvil is disposed on the top surface of the ramp.

3. The tissue fastening device of claim 1, wherein the anvil includes an anvil recess extending into the surface of the anvil, and wherein the anvil recess is configured to engage the locking mechanism to lock the anvil in the closed position.

4. The tissue fastening device of claim 3, wherein the locking mechanism includes a clamp on the body, wherein the clamp is configured to engage the anvil recess.

5. The tissue fastening device of claim 4, wherein the clamp includes a clamp protrusion extending from the top surface of the clamp, and wherein the clamp protrusion is configured to engage the anvil recess when the anvil is in the closed position.

6. The tissue fastening device of claim 5, further comprising a clamping wire connected to the bottom surface of the clamp and extending to the proximal side of the clamp, wherein the clamping wire is movable toward the proximal side to move the clamp away from the anvil and disengage the clamping protrusion from the anvil recess.

7. The tissue fastening device of claim 3, wherein the locking mechanism comprises an actuating wire extending proximally and having a locking pin attached to a distal end of the actuating wire, and wherein the locking pin engages the anvil recess in the closed position.

8. The tissue fastening device according to claim 7, wherein the anvil recess faces the proximal direction when the anvil is in the closed position.

9. The tissue fastening device of claim 7, further comprising a pulley, wherein the actuating wire is configured to engage the pulley.

10. The tissue fastening device of claim 9, further comprising a biasing mechanism extending within the body and connected to the locking pin, wherein the biasing mechanism is configured to bias the locking pin toward the anvil.

11. The tissue fastening device according to any one of the preceding claims, wherein the body includes slots in opposite sidewalls of the body, wherein the anvil includes pins extending from the opposite sidewalls, and wherein each pin is configured to engage a corresponding slot in the body and slide relative to the body within the slot.

12. The tissue fastening device according to any one of claims 1 to 10, wherein the anvil is substantially parallel to the body when the anvil is locked in the closed position by the locking mechanism.

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